4 * Copyright (C) Linaro.
5 * Copyright (C) Huawei Futurewei Technologies.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #ifndef _ARM64_KEXEC_H
13 #define _ARM64_KEXEC_H
15 /* Maximum physical address we can use pages from */
17 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
19 /* Maximum address we can reach in physical address mode */
21 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
23 /* Maximum address we can use for the control code buffer */
25 #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
27 #define KEXEC_CONTROL_PAGE_SIZE 4096
29 #define KEXEC_ARCH KEXEC_ARCH_AARCH64
34 * crash_setup_regs() - save registers for the panic kernel
36 * @newregs: registers are saved here
37 * @oldregs: registers to be saved (may be %NULL)
40 static inline void crash_setup_regs(struct pt_regs *newregs,
41 struct pt_regs *oldregs)
44 memcpy(newregs, oldregs, sizeof(*newregs));
48 __asm__ __volatile__ (
49 "stp x0, x1, [%2, #16 * 0]\n"
50 "stp x2, x3, [%2, #16 * 1]\n"
51 "stp x4, x5, [%2, #16 * 2]\n"
52 "stp x6, x7, [%2, #16 * 3]\n"
53 "stp x8, x9, [%2, #16 * 4]\n"
54 "stp x10, x11, [%2, #16 * 5]\n"
55 "stp x12, x13, [%2, #16 * 6]\n"
56 "stp x14, x15, [%2, #16 * 7]\n"
57 "stp x16, x17, [%2, #16 * 8]\n"
58 "stp x18, x19, [%2, #16 * 9]\n"
59 "stp x20, x21, [%2, #16 * 10]\n"
60 "stp x22, x23, [%2, #16 * 11]\n"
61 "stp x24, x25, [%2, #16 * 12]\n"
62 "stp x26, x27, [%2, #16 * 13]\n"
63 "stp x28, x29, [%2, #16 * 14]\n"
65 "stp x30, %0, [%2, #16 * 15]\n"
67 "/* faked current PSTATE */\n"
78 "stp %1, %0, [%2, #16 * 16]\n"
79 : "=&r" (tmp1), "=&r" (tmp2)
86 #if defined(CONFIG_KEXEC_CORE) && defined(CONFIG_HIBERNATION)
87 extern bool crash_is_nosave(unsigned long pfn);
88 extern void crash_prepare_suspend(void);
89 extern void crash_post_resume(void);
91 static inline bool crash_is_nosave(unsigned long pfn) {return false; }
92 static inline void crash_prepare_suspend(void) {}
93 static inline void crash_post_resume(void) {}
96 #endif /* __ASSEMBLY__ */